Refprop 91 Install !!exclusive!! May 2026

REFPROP is a commercial product. You must have the REFPROP91.EXE setup file or the physical media purchased from NIST.

Windows 7, 8, 10, or 11 (32-bit or 64-bit). 2. Running the Core Installation Launch the Setup: Double-click the REFPROP91.EXE file. License Agreement: Read and accept the NIST license terms. refprop 91 install

Click and navigate to your installation folder (usually C:\Program Files (x86)\REFPROP ). Select REFPROP.xlam (for modern Excel) or REFPROP.xla . REFPROP is a commercial product

If you see #NAME? in Excel, it usually means the REFPROP.xlam is active but it cannot find the REFPROP.dll in the Windows system folders. refprop 91 install